I didn't respond to your post on P.R. chip prices, Archie, even though I've purchased lots of these chips. The reason is just what you said: this is a thin market and an inefficient one. I've paid $10 and $75 for the same Caribbean chip from different sources; the $10 from an antique mall who didn't know what they had; the $75 from John Benedict who obviously did. This is just the way an inefficient market works.

It seems to me one way to get started would be to establish a scale of rarity and give each chip a rarity code. You could indicate somewhere in the guide what the 1998 ranges are for each rarity code and this would at least help the potential buyer decide if the price asked is generally in line. I think this is done for some of the coin publications that have seldom-traded coins... patterns for instance. You might give some thought to this. I would be happy to respond to a survey asking how many of each chip in your check-list I own... or maybe how many I've see in total? If you wanted to know what I paid, I'd certainly supply this but you need a lot of buyers of a particular chip to get a good average to publish.

Certainly, you could have a code for "current chip"; even if nothing else is published, this would help new collectors who, rather than pay $50, would know they could get the $5 chip off the table if they wanted to go to San Juan.
Another relatively easy number to get would be the latest auction price for a chip. Howdy has auctioned many P.R. chips and a date-and-$amount with a code indicating an auction price would be valuable. I have all the Gaming Archaeology catalogs if you don't and would agree to help with this part of the research.

DonL